mirror of
https://git.savannah.gnu.org/git/bison.git
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cff03fb2b9
When reporting useless rules and nonterminals, say "useless in grammar" instead of "useless", and say "useless in parser" instead of "never reduced". Discussed starting at <http://lists.gnu.org/archive/html/bison-patches/2007-10/msg00033.html>. * NEWS (2.3a+): Mention this change. * data/xslt/xml2text.xsl: Update output text and expected input XML element names to match changes below. * data/xslt/xml2xhtml.xsl: Likewise. (xsl:template match="bison-xml-report"): Add missing entry in Table of Contents: "Rules useless in parser due to conflicts". * doc/bison.texinfo (Decl Summary): Reword a little. (Understanding): Update example output for changes below. * src/gram.c: (rule_useful_p): Rename to... (rule_useful_in_grammar_p): ... this. (rule_useless_p): Rename to... (rule_useless_in_grammar_p): ... this. (rule_never_reduced_p): Rename to... (rule_useless_in_parser_p): ... this. (grammar_rules_print): Update for renames. (grammar_rules_print_xml): Update for renames. (grammar_rules_never_reduced_report): Rename to... (grammar_rules_useless_report): ... this since it is used for either kind of useless rule. * src/gram.h: Reword comments and update function names in prototypes. * src/main.c (main): Say "rule useless in parser due to conflicts". * src/print-xml.c (print_rules_never_reduced): Rename to... (print_rules_useless_in_parser): ... this, and rename output XML element "rules-never-reduced" to "rules-useless-in-parser". (print_xml): Update for rename. * src/print.c (print_results): Say "Rules useless in parser due to conflicts". * src/reduce.c (reduce_grammar_tables): Say "rule useless in grammar". (nonterminals_reduce): Say "nonterminal useless in grammar". (reduce_output): Say "Nonterminals useless in grammar". Say "Rules useless in grammar". (reduce_xml): Rename output XML element "useless" to "useless-in-grammar". (reduce_print): Don't report the count of grammatically useless rules as "rules never reduced" just because %yacc is specified. In the correct report of this count, say nonterminal(s) and rule(s) "useless in grammar". * tests/conflicts.at (S/R in initial): Update expected output. (Defaulted Conflicted Reduction): Likewise. (Unreachable States After Conflict Resolution): Likewise. * tests/existing.at (GNU pic Grammar): Likewise. * tests/reduce.at (Useless Nonterminals): Likewise. (Useless Rules): Likewise. (Reduced Automaton): Likewise. (Underivable Rules): Likewise. (Empty Language): Likewise.
563 lines
17 KiB
XML
563 lines
17 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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xml2text.xsl - transform Bison XML Report into plain text.
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$Id$
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Copyright (C) 2007 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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Written by Wojciech Polak <polak@gnu.org>.
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-->
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<xsl:stylesheet version="1.0"
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xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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xmlns:bison="http://www.gnu.org/software/bison/">
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<xsl:import href="bison.xsl"/>
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<xsl:output method="text" encoding="UTF-8" indent="no"/>
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<xsl:template match="/">
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<xsl:apply-templates select="bison-xml-report"/>
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</xsl:template>
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<xsl:template match="bison-xml-report">
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<xsl:apply-templates select="reductions"/>
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<xsl:apply-templates select="rules-useless-in-parser"/>
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<xsl:apply-templates select="automaton" mode="conflicts"/>
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<xsl:apply-templates select="grammar"/>
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<xsl:apply-templates select="automaton"/>
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</xsl:template>
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<xsl:template match="rules-useless-in-parser">
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<xsl:if test="rule">
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<xsl:text>Rules useless in parser due to conflicts </xsl:text>
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<xsl:apply-templates select="rule">
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<xsl:with-param name="pad" select="'3'"/>
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</xsl:apply-templates>
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<xsl:text> </xsl:text>
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</xsl:if>
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</xsl:template>
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<xsl:template match="reductions">
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<xsl:apply-templates select="useless-in-grammar/nonterminals"/>
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<xsl:apply-templates select="unused/terminals"/>
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<xsl:apply-templates select="useless-in-grammar/rules"/>
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</xsl:template>
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<xsl:template match="useless-in-grammar/nonterminals">
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<xsl:if test="nonterminal">
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<xsl:text>Nonterminals useless in grammar </xsl:text>
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<xsl:for-each select="nonterminal">
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<xsl:text> </xsl:text>
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<xsl:value-of select="."/>
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<xsl:text> </xsl:text>
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</xsl:for-each>
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<xsl:text> </xsl:text>
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</xsl:if>
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</xsl:template>
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<xsl:template match="useless-in-grammar/rules">
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<xsl:if test="rule">
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<xsl:text>Rules useless in grammar </xsl:text>
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<xsl:apply-templates select="rule">
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<xsl:with-param name="pad" select="'3'"/>
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</xsl:apply-templates>
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<xsl:text> </xsl:text>
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</xsl:if>
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</xsl:template>
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<xsl:template match="unused/terminals">
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<xsl:if test="terminal">
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<xsl:text>Terminals which are not used </xsl:text>
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<xsl:for-each select="terminal">
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<xsl:text> </xsl:text>
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<xsl:value-of select="."/>
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<xsl:text> </xsl:text>
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</xsl:for-each>
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<xsl:text> </xsl:text>
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</xsl:if>
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</xsl:template>
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<xsl:template match="grammar">
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<xsl:text>Grammar </xsl:text>
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<xsl:apply-templates select="rules/rule">
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<xsl:with-param name="pad" select="'3'"/>
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</xsl:apply-templates>
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<xsl:text> </xsl:text>
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<xsl:apply-templates select="terminals"/>
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<xsl:apply-templates select="nonterminals"/>
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</xsl:template>
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<xsl:template match="grammar/terminals">
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<xsl:text>Terminals, with rules where they appear </xsl:text>
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<xsl:apply-templates select="terminal"/>
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<xsl:text> </xsl:text>
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</xsl:template>
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<xsl:template match="grammar/nonterminals">
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<xsl:text>Nonterminals, with rules where they appear </xsl:text>
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<xsl:apply-templates select="nonterminal"/>
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</xsl:template>
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<xsl:template match="terminal">
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<xsl:value-of select="@name"/>
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<xsl:call-template name="line-wrap">
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<xsl:with-param name="first-line-length">
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<xsl:choose>
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<xsl:when test="string-length(@name) > 66">0</xsl:when>
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<xsl:otherwise>
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<xsl:value-of select="66 - string-length(@name)" />
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</xsl:otherwise>
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</xsl:choose>
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</xsl:with-param>
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<xsl:with-param name="line-length" select="66" />
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<xsl:with-param name="text">
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<xsl:value-of select="concat(' (', @token-number, ')')"/>
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<xsl:apply-templates select="rule" />
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</xsl:with-param>
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</xsl:call-template>
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</xsl:template>
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<xsl:template match="terminal/rule">
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<xsl:text> </xsl:text>
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<xsl:value-of select="."/>
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</xsl:template>
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<xsl:template match="nonterminal">
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<xsl:value-of select="@name"/>
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<xsl:value-of select="concat(' (', @symbol-number, ')')"/>
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<xsl:text> </xsl:text>
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<xsl:variable name="output">
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<xsl:call-template name="line-wrap">
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<xsl:with-param name="line-length" select="66" />
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<xsl:with-param name="text">
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<xsl:text> </xsl:text>
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<xsl:if test="left/rule">
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<xsl:text>on@left:</xsl:text>
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</xsl:if>
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<xsl:apply-templates select="left/rule"/>
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<xsl:if test="left/rule and right/rule">
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<xsl:text>, </xsl:text>
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</xsl:if>
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<xsl:if test="right/rule">
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<xsl:text>on@right:</xsl:text>
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</xsl:if>
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<xsl:apply-templates select="right/rule"/>
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</xsl:with-param>
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</xsl:call-template>
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</xsl:variable>
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<xsl:value-of select="translate($output, '@', ' ')" />
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</xsl:template>
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<xsl:template match="nonterminal/left/rule|nonterminal/right/rule">
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<xsl:text> </xsl:text>
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<xsl:value-of select="."/>
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</xsl:template>
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<xsl:template match="automaton" mode="conflicts">
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<xsl:variable name="conflict-report">
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<xsl:apply-templates select="state" mode="conflicts"/>
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</xsl:variable>
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<xsl:if test="string-length($conflict-report) != 0">
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<xsl:value-of select="$conflict-report"/>
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<xsl:text> </xsl:text>
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</xsl:if>
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</xsl:template>
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<xsl:template match="state" mode="conflicts">
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<xsl:variable name="conflict-counts">
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<xsl:apply-templates select="." mode="bison:count-conflicts" />
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</xsl:variable>
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<xsl:variable
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name="sr-count" select="substring-before($conflict-counts, ',')"
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/>
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<xsl:variable
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name="rr-count" select="substring-after($conflict-counts, ',')"
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/>
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<xsl:if test="$sr-count > 0 or $rr-count > 0">
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<xsl:value-of select="concat('State ', @number, ' conflicts:')"/>
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<xsl:if test="$sr-count > 0">
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<xsl:value-of select="concat(' ', $sr-count, ' shift/reduce')"/>
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<xsl:if test="$rr-count > 0">
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<xsl:value-of select="(',')"/>
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</xsl:if>
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</xsl:if>
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<xsl:if test="$rr-count > 0">
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<xsl:value-of select="concat(' ', $rr-count, ' reduce/reduce')"/>
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</xsl:if>
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<xsl:value-of select="' '"/>
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</xsl:if>
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</xsl:template>
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<xsl:template match="automaton">
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<xsl:apply-templates select="state">
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<xsl:with-param name="pad" select="'3'"/>
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</xsl:apply-templates>
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</xsl:template>
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<xsl:template match="automaton/state">
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<xsl:param name="pad"/>
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<xsl:text> </xsl:text>
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<xsl:text>state </xsl:text>
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<xsl:value-of select="@number"/>
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<xsl:text> </xsl:text>
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<xsl:apply-templates select="itemset/item">
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<xsl:with-param name="pad" select="$pad"/>
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</xsl:apply-templates>
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<xsl:apply-templates select="actions/transitions">
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<xsl:with-param name="type" select="'shift'"/>
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</xsl:apply-templates>
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<xsl:apply-templates select="actions/errors"/>
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<xsl:apply-templates select="actions/reductions"/>
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<xsl:apply-templates select="actions/transitions">
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<xsl:with-param name="type" select="'goto'"/>
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</xsl:apply-templates>
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<xsl:apply-templates select="solved-conflicts"/>
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</xsl:template>
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<xsl:template match="actions/transitions">
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<xsl:param name="type"/>
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<xsl:if test="transition[@type = $type]">
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<xsl:text> </xsl:text>
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<xsl:apply-templates select="transition[@type = $type]">
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<xsl:with-param name="pad">
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<xsl:call-template name="max-width-symbol">
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<xsl:with-param name="node" select="transition[@type = $type]"/>
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</xsl:call-template>
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</xsl:with-param>
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</xsl:apply-templates>
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</xsl:if>
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</xsl:template>
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<xsl:template match="actions/errors">
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<xsl:if test="error">
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<xsl:text> </xsl:text>
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<xsl:apply-templates select="error">
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<xsl:with-param name="pad">
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<xsl:call-template name="max-width-symbol">
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<xsl:with-param name="node" select="error"/>
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</xsl:call-template>
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</xsl:with-param>
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</xsl:apply-templates>
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</xsl:if>
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</xsl:template>
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<xsl:template match="actions/reductions">
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<xsl:if test="reduction">
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<xsl:text> </xsl:text>
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<xsl:apply-templates select="reduction">
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<xsl:with-param name="pad">
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<xsl:call-template name="max-width-symbol">
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<xsl:with-param name="node" select="reduction"/>
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</xsl:call-template>
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</xsl:with-param>
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</xsl:apply-templates>
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</xsl:if>
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</xsl:template>
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<xsl:template match="item">
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<xsl:param name="pad"/>
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<xsl:param name="prev-rule-number"
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select="preceding-sibling::item[1]/@rule-number"/>
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<xsl:apply-templates select="key('bison:ruleNumber', current()/@rule-number)">
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<xsl:with-param name="itemset" select="'true'"/>
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<xsl:with-param name="pad" select="$pad"/>
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<xsl:with-param name="prev-lhs"
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select="key('bison:ruleNumber', $prev-rule-number)/lhs[text()]"/>
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<xsl:with-param name="point" select="@point"/>
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<xsl:with-param name="lookaheads">
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<xsl:apply-templates select="lookaheads"/>
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</xsl:with-param>
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</xsl:apply-templates>
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</xsl:template>
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<xsl:template match="rule">
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<xsl:param name="itemset"/>
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<xsl:param name="pad"/>
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<xsl:param name="prev-lhs"/>
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<xsl:param name="point"/>
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<xsl:param name="lookaheads"/>
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<xsl:if test="$itemset != 'true'
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and not(preceding-sibling::rule[1]/lhs[text()] = lhs[text()])">
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<xsl:text> </xsl:text>
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</xsl:if>
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<xsl:text> </xsl:text>
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<xsl:call-template name="lpad">
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<xsl:with-param name="str" select="string(@number)"/>
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<xsl:with-param name="pad" select="number($pad)"/>
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</xsl:call-template>
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<xsl:text> </xsl:text>
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<!-- LHS -->
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<xsl:choose>
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<xsl:when test="$itemset != 'true'
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and preceding-sibling::rule[1]/lhs[text()] = lhs[text()]">
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<xsl:call-template name="lpad">
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<xsl:with-param name="str" select="'|'"/>
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<xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
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</xsl:call-template>
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</xsl:when>
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<xsl:when test="$itemset = 'true' and $prev-lhs = lhs[text()]">
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<xsl:call-template name="lpad">
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<xsl:with-param name="str" select="'|'"/>
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<xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
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</xsl:call-template>
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</xsl:when>
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<xsl:otherwise>
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<xsl:value-of select="lhs"/>
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<xsl:text>:</xsl:text>
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</xsl:otherwise>
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</xsl:choose>
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<!-- RHS -->
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<xsl:for-each select="rhs/*">
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<xsl:if test="position() = $point + 1">
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<xsl:text> .</xsl:text>
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</xsl:if>
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<xsl:if test="$itemset = 'true' and name(.) != 'empty'">
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<xsl:apply-templates select="."/>
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</xsl:if>
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<xsl:if test="$itemset != 'true'">
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<xsl:apply-templates select="."/>
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</xsl:if>
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<xsl:if test="position() = last() and position() = $point">
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<xsl:text> .</xsl:text>
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</xsl:if>
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</xsl:for-each>
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<xsl:if test="$lookaheads">
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<xsl:value-of select="$lookaheads"/>
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</xsl:if>
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<xsl:text> </xsl:text>
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</xsl:template>
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<xsl:template match="symbol">
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<xsl:text> </xsl:text>
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<xsl:value-of select="."/>
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</xsl:template>
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<xsl:template match="empty">
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<xsl:text> /* empty */</xsl:text>
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</xsl:template>
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<xsl:template match="lookaheads">
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<xsl:text> [</xsl:text>
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<xsl:apply-templates select="symbol"/>
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<xsl:text>]</xsl:text>
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</xsl:template>
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<xsl:template match="lookaheads/symbol">
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<xsl:value-of select="."/>
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<xsl:if test="position() != last()">
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<xsl:text>, </xsl:text>
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</xsl:if>
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</xsl:template>
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<xsl:template match="transition">
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<xsl:param name="pad"/>
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<xsl:text> </xsl:text>
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<xsl:call-template name="rpad">
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<xsl:with-param name="str" select="string(@symbol)"/>
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<xsl:with-param name="pad" select="number($pad) + 2"/>
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</xsl:call-template>
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<xsl:choose>
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<xsl:when test="@type = 'shift'">
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<xsl:text>shift, and go to state </xsl:text>
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<xsl:value-of select="@state"/>
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</xsl:when>
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<xsl:when test="@type = 'goto'">
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<xsl:text>go to state </xsl:text>
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<xsl:value-of select="@state"/>
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</xsl:when>
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</xsl:choose>
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<xsl:text> </xsl:text>
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</xsl:template>
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<xsl:template match="error">
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<xsl:param name="pad"/>
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<xsl:text> </xsl:text>
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<xsl:call-template name="rpad">
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<xsl:with-param name="str" select="string(@symbol)"/>
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<xsl:with-param name="pad" select="number($pad) + 2"/>
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</xsl:call-template>
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<xsl:text>error</xsl:text>
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<xsl:text> (</xsl:text>
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<xsl:value-of select="text()"/>
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<xsl:text>)</xsl:text>
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<xsl:text> </xsl:text>
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</xsl:template>
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<xsl:template match="reduction">
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<xsl:param name="pad"/>
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<xsl:text> </xsl:text>
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<xsl:call-template name="rpad">
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<xsl:with-param name="str" select="string(@symbol)"/>
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<xsl:with-param name="pad" select="number($pad) + 2"/>
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</xsl:call-template>
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<xsl:if test="@enabled = 'false'">
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<xsl:text>[</xsl:text>
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</xsl:if>
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<xsl:choose>
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<xsl:when test="@rule = 'accept'">
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<xsl:text>accept</xsl:text>
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</xsl:when>
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<xsl:otherwise>
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<xsl:text>reduce using rule </xsl:text>
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<xsl:value-of select="@rule"/>
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<xsl:text> (</xsl:text>
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<xsl:value-of
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select="key('bison:ruleNumber', current()/@rule)/lhs[text()]"/>
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<xsl:text>)</xsl:text>
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</xsl:otherwise>
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</xsl:choose>
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<xsl:if test="@enabled = 'false'">
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<xsl:text>]</xsl:text>
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</xsl:if>
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<xsl:text> </xsl:text>
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</xsl:template>
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<xsl:template match="solved-conflicts">
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<xsl:if test="resolution">
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<xsl:text> </xsl:text>
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<xsl:apply-templates select="resolution"/>
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</xsl:if>
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</xsl:template>
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<xsl:template match="resolution">
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<xsl:text> Conflict between rule </xsl:text>
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<xsl:value-of select="@rule"/>
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<xsl:text> and token </xsl:text>
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<xsl:value-of select="@symbol"/>
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<xsl:text> resolved as </xsl:text>
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<xsl:if test="@type = 'error'">
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<xsl:text>an </xsl:text>
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</xsl:if>
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<xsl:value-of select="@type"/>
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<xsl:text> (</xsl:text>
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<xsl:value-of select="."/>
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<xsl:text>). </xsl:text>
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</xsl:template>
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<xsl:template name="max-width-symbol">
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<xsl:param name="node"/>
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<xsl:variable name="longest">
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<xsl:for-each select="$node">
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<xsl:sort data-type="number" select="string-length(@symbol)"
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order="descending"/>
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<xsl:if test="position() = 1">
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<xsl:value-of select="string-length(@symbol)"/>
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</xsl:if>
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</xsl:for-each>
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</xsl:variable>
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<xsl:value-of select="$longest"/>
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</xsl:template>
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<xsl:template name="lpad">
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<xsl:param name="str" select="''"/>
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<xsl:param name="pad" select="0"/>
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<xsl:variable name="diff" select="$pad - string-length($str)" />
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<xsl:choose>
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<xsl:when test="$diff < 0">
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<xsl:value-of select="$str"/>
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</xsl:when>
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<xsl:otherwise>
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<xsl:call-template name="space">
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<xsl:with-param name="repeat" select="$diff"/>
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</xsl:call-template>
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<xsl:value-of select="$str"/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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|
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<xsl:template name="rpad">
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<xsl:param name="str" select="''"/>
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<xsl:param name="pad" select="0"/>
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<xsl:variable name="diff" select="$pad - string-length($str)"/>
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<xsl:choose>
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<xsl:when test="$diff < 0">
|
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<xsl:value-of select="$str"/>
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</xsl:when>
|
|
<xsl:otherwise>
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<xsl:value-of select="$str"/>
|
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<xsl:call-template name="space">
|
|
<xsl:with-param name="repeat" select="$diff"/>
|
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</xsl:call-template>
|
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</xsl:otherwise>
|
|
</xsl:choose>
|
|
</xsl:template>
|
|
|
|
<xsl:template name="space">
|
|
<xsl:param name="repeat">0</xsl:param>
|
|
<xsl:param name="fill" select="' '"/>
|
|
<xsl:if test="number($repeat) >= 1">
|
|
<xsl:call-template name="space">
|
|
<xsl:with-param name="repeat" select="$repeat - 1"/>
|
|
<xsl:with-param name="fill" select="$fill"/>
|
|
</xsl:call-template>
|
|
<xsl:value-of select="$fill"/>
|
|
</xsl:if>
|
|
</xsl:template>
|
|
|
|
<xsl:template name="line-wrap">
|
|
<xsl:param name="line-length"/> <!-- required -->
|
|
<xsl:param name="first-line-length" select="$line-length"/>
|
|
<xsl:param name="text"/> <!-- required -->
|
|
<xsl:choose>
|
|
<xsl:when test="normalize-space($text) = ''" />
|
|
<xsl:when test="string-length($text) <= $first-line-length">
|
|
<xsl:value-of select="concat($text, ' ')" />
|
|
</xsl:when>
|
|
<xsl:otherwise>
|
|
<xsl:variable name="break-pos">
|
|
<xsl:call-template name="ws-search">
|
|
<xsl:with-param name="text" select="$text" />
|
|
<xsl:with-param name="start" select="$first-line-length+1" />
|
|
</xsl:call-template>
|
|
</xsl:variable>
|
|
<xsl:value-of select="substring($text, 1, $break-pos - 1)" />
|
|
<xsl:text> </xsl:text>
|
|
<xsl:call-template name="line-wrap">
|
|
<xsl:with-param name="line-length" select="$line-length" />
|
|
<xsl:with-param
|
|
name="text" select="concat(' ', substring($text, $break-pos+1))"
|
|
/>
|
|
</xsl:call-template>
|
|
</xsl:otherwise>
|
|
</xsl:choose>
|
|
</xsl:template>
|
|
|
|
<xsl:template name="ws-search">
|
|
<xsl:param name="text"/> <!-- required -->
|
|
<xsl:param name="start"/> <!-- required -->
|
|
<xsl:variable name="search-text" select="substring($text, $start)" />
|
|
<xsl:choose>
|
|
<xsl:when test="not(contains($search-text, ' '))">
|
|
<xsl:value-of select="string-length($text)+1" />
|
|
</xsl:when>
|
|
<xsl:otherwise>
|
|
<xsl:value-of
|
|
select="$start + string-length(substring-before($search-text, ' '))"
|
|
/>
|
|
</xsl:otherwise>
|
|
</xsl:choose>
|
|
</xsl:template>
|
|
|
|
</xsl:stylesheet>
|